This is the 'Puffa Fish' sharing bowl made for the UK-based 'Lola Lo' chain of Tiki Bars by CheekyTiki. As with the other Lola Lo mugs it's supposedly available to buy through CheekyTiki's website - though you'd be hard-pressed to find it there.
Light blue glaze both interior and exterior. Measures 6" wide by 9.5" long (including the tail) so it's a bit of a whopper.